FN Archimer Export Format
PT J
TI Brachyuran crab community structure and associated sediment reworking activities in pioneer and young mangroves of French Guiana, South America
BT 
AF ASCHENBROICH, Adelaide
   MICHAUD, Emma
   STIEGLITZ, Thomas
   FROMARD, Francois
   GARDEL, Antoine
   TAVARES, Marcos
   THOUZEAU, Gerard
AS 1:1;2:1;3:2;4:3;5:4,5;6:6;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 IUEM, IFREMER, IRD, Lab Sci Environm Marin LEMAR,CNRS,UMR 6539,UBO, Rue Dumont Urville,Technopole Brest Iroise, F-29280 Plouzane, France.
   James Cook Univ, Ctr Trop Water & Aquat Ecosyst Res TropWATER, Townsville, Qld 4811, Australia.
   Univ Toulouse, EcoLab, CNRS, INPT,UPS, 118 Route Narbonne,Bat 4R1, F-31062 Toulouse 9, France.
   USTL, CNRS, UMR 8187, LOG,ULCO, 32 Ave Foch, F-62930 Wimereux, France.
   USR, LEEISA, 275 Route Montabo, Cayenne 97334, French Guiana.
   Univ Sao Paulo, Museum Zool, Ave Nazareth 481, BR-04263000 Sao Paulo, SP, Brazil.
C2 CNRS, FRANCE
   UNIV JAMES COOK, AUSTRALIA
   UNIV TOULOUSE, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   CNRS, FRANCE
   UNIV SAO PAULO, BRAZIL
UM LEMAR
   LEEISA
IF 2.176
TC 22
UR https://archimer.ifremer.fr/doc/00350/46154/45852.pdf
LA English
DT Article
DE ;Mangroves;Crabs;Community composition;Bioturbation;French Guiana;Amazon
AB This study in French Guiana evaluates the changes of crab assemblages and their bioturbation activities between mangrove early stages (pioneer and young mangrove) and within stages by taking their spatial heterogeneity (tidal channels, flat areas, pools) into account. The results show differences in crab assemblage structure between and within the early stages of mangrove in relation to microhabitat and sediment characteristics. The sediment reworking rates are a function of the biomass or density of particular species (Ucides cordatus, Uca cumulanta) and burrower functional groups. Crab species or functional interaction mediate changes in sediment reworking rates suggesting the need to consider entire benthic communities rather than single species. This study suggests that the role of the microhabitat in determining the biologically-induced sediment reworking rates depended on the age of the mangrove. Feeding activity results in a sediment turnover of 11.7 ± 9.7 gdw m−2 day−1 and 6.8 ± 3.0 gdw m−2 day−1 in the pioneer and young mangroves, respectively. Burrow maintenance excavates 40.5 ± 7.4 gdw m−2 day−1 and 251.3 ± 419.7 gdw m−2 day−1 in the pioneer and young mangroves, respectively. Upscaling to the studied area (Sinnamary estuary: 6 km2), shows that 500 tons.day−1 and 20 tons.day−1 of sediments could be excavated and pelletized, respectively, during the spring tides of the dry season. Thus, biological sediment reworking would greatly contribute to the sedimentary dynamics of the Guianese mangroves under Amazonian influence.
PY 2016
PD DEC
SO Estuarine Coastal And Shelf Science
SN 0272-7714
PU Academic Press Ltd- Elsevier Science Ltd
VL 182
IS Part.A
UT 000390627700006
BP 60
EP 71
DI 10.1016/j.ecss.2016.09.003
ID 46154
ER

EF